<span class="pf-c-button__icon{{#if button-icon--modifier}} {{button-icon--modifier}}{{/if}}"
  {{#if button-icon--attribute}}
    {{{button-icon--attribute}}}
  {{/if}}>
  {{#if button-icon--name}}
    <i class="{{{button-icon--name}}}" aria-hidden="true"></i>
  {{else}}
    {{> @partial-block}}
  {{/if}}
</span>
